Line data Source code
1 : // Copyright 2016 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #include "src/inspector/search-util.h"
6 :
7 : #include "src/inspector/protocol/Protocol.h"
8 : #include "src/inspector/v8-inspector-impl.h"
9 : #include "src/inspector/v8-inspector-session-impl.h"
10 : #include "src/inspector/v8-regex.h"
11 :
12 : namespace v8_inspector {
13 :
14 : namespace {
15 :
16 372 : String16 findMagicComment(const String16& content, const String16& name,
17 : bool multiline) {
18 : DCHECK_EQ(String16::kNotFound, name.find("="));
19 : size_t length = content.length();
20 : size_t nameLength = name.length();
21 :
22 : size_t pos = length;
23 : size_t equalSignPos = 0;
24 : size_t closingCommentPos = 0;
25 : while (true) {
26 : pos = content.reverseFind(name, pos);
27 372 : if (pos == String16::kNotFound) return String16();
28 :
29 : // Check for a /\/[\/*][@#][ \t]/ regexp (length of 4) before found name.
30 30 : if (pos < 4) return String16();
31 30 : pos -= 4;
32 30 : if (content[pos] != '/') continue;
33 90 : if ((content[pos + 1] != '/' || multiline) &&
34 0 : (content[pos + 1] != '*' || !multiline))
35 : continue;
36 60 : if (content[pos + 2] != '#' && content[pos + 2] != '@') continue;
37 60 : if (content[pos + 3] != ' ' && content[pos + 3] != '\t') continue;
38 30 : equalSignPos = pos + 4 + nameLength;
39 60 : if (equalSignPos < length && content[equalSignPos] != '=') continue;
40 30 : if (multiline) {
41 0 : closingCommentPos = content.find("*/", equalSignPos + 1);
42 0 : if (closingCommentPos == String16::kNotFound) return String16();
43 : }
44 :
45 : break;
46 : }
47 :
48 : DCHECK(equalSignPos);
49 : DCHECK(!multiline || closingCommentPos);
50 30 : size_t urlPos = equalSignPos + 1;
51 : String16 match = multiline
52 : ? content.substring(urlPos, closingCommentPos - urlPos)
53 30 : : content.substring(urlPos);
54 :
55 60 : size_t newLine = match.find("\n");
56 35 : if (newLine != String16::kNotFound) match = match.substring(0, newLine);
57 60 : match = match.stripWhiteSpace();
58 :
59 700 : for (size_t i = 0; i < match.length(); ++i) {
60 : UChar c = match[i];
61 335 : if (c == '"' || c == '\'' || c == ' ' || c == '\t') return "";
62 : }
63 :
64 : return match;
65 : }
66 :
67 0 : String16 createSearchRegexSource(const String16& text) {
68 0 : String16Builder result;
69 :
70 0 : for (size_t i = 0; i < text.length(); i++) {
71 : UChar c = text[i];
72 0 : if (c == '[' || c == ']' || c == '(' || c == ')' || c == '{' || c == '}' ||
73 0 : c == '+' || c == '-' || c == '*' || c == '.' || c == ',' || c == '?' ||
74 0 : c == '\\' || c == '^' || c == '$' || c == '|') {
75 0 : result.append('\\');
76 : }
77 0 : result.append(c);
78 : }
79 :
80 0 : return result.toString();
81 : }
82 :
83 0 : std::unique_ptr<std::vector<size_t>> lineEndings(const String16& text) {
84 0 : std::unique_ptr<std::vector<size_t>> result(new std::vector<size_t>());
85 :
86 0 : const String16 lineEndString = "\n";
87 : size_t start = 0;
88 0 : while (start < text.length()) {
89 0 : size_t lineEnd = text.find(lineEndString, start);
90 0 : if (lineEnd == String16::kNotFound) break;
91 :
92 0 : result->push_back(lineEnd);
93 0 : start = lineEnd + 1;
94 : }
95 0 : result->push_back(text.length());
96 :
97 0 : return result;
98 : }
99 :
100 0 : std::vector<std::pair<int, String16>> scriptRegexpMatchesByLines(
101 : const V8Regex& regex, const String16& text) {
102 : std::vector<std::pair<int, String16>> result;
103 0 : if (text.isEmpty()) return result;
104 :
105 0 : std::unique_ptr<std::vector<size_t>> endings(lineEndings(text));
106 : size_t size = endings->size();
107 : size_t start = 0;
108 0 : for (size_t lineNumber = 0; lineNumber < size; ++lineNumber) {
109 0 : size_t lineEnd = endings->at(lineNumber);
110 0 : String16 line = text.substring(start, lineEnd - start);
111 0 : if (line.length() && line[line.length() - 1] == '\r')
112 0 : line = line.substring(0, line.length() - 1);
113 :
114 : int matchLength;
115 0 : if (regex.match(line, 0, &matchLength) != -1)
116 0 : result.push_back(std::pair<int, String16>(lineNumber, line));
117 :
118 0 : start = lineEnd + 1;
119 : }
120 : return result;
121 : }
122 :
123 0 : std::unique_ptr<protocol::Debugger::SearchMatch> buildObjectForSearchMatch(
124 : int lineNumber, const String16& lineContent) {
125 0 : return protocol::Debugger::SearchMatch::create()
126 0 : .setLineNumber(lineNumber)
127 : .setLineContent(lineContent)
128 0 : .build();
129 : }
130 :
131 0 : std::unique_ptr<V8Regex> createSearchRegex(V8InspectorImpl* inspector,
132 : const String16& query,
133 : bool caseSensitive, bool isRegex) {
134 0 : String16 regexSource = isRegex ? query : createSearchRegexSource(query);
135 : return std::unique_ptr<V8Regex>(
136 0 : new V8Regex(inspector, regexSource, caseSensitive));
137 : }
138 :
139 : } // namespace
140 :
141 : std::vector<std::unique_ptr<protocol::Debugger::SearchMatch>>
142 0 : searchInTextByLinesImpl(V8InspectorSession* session, const String16& text,
143 : const String16& query, const bool caseSensitive,
144 : const bool isRegex) {
145 : std::unique_ptr<V8Regex> regex = createSearchRegex(
146 : static_cast<V8InspectorSessionImpl*>(session)->inspector(), query,
147 0 : caseSensitive, isRegex);
148 : std::vector<std::pair<int, String16>> matches =
149 0 : scriptRegexpMatchesByLines(*regex.get(), text);
150 :
151 : std::vector<std::unique_ptr<protocol::Debugger::SearchMatch>> result;
152 0 : for (const auto& match : matches)
153 0 : result.push_back(buildObjectForSearchMatch(match.first, match.second));
154 0 : return result;
155 : }
156 :
157 186 : String16 findSourceURL(const String16& content, bool multiline) {
158 372 : return findMagicComment(content, "sourceURL", multiline);
159 : }
160 :
161 186 : String16 findSourceMapURL(const String16& content, bool multiline) {
162 372 : return findMagicComment(content, "sourceMappingURL", multiline);
163 : }
164 :
165 : } // namespace v8_inspector
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